TheAMCForum.com Homepage
Forum Home Forum Home > The Garage > Suspension, Steering, Brakes & Wheels
  New Posts New Posts RSS Feed - Brake failureight on. 72 javelin
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Click for TheAMCForum Rules / Click for PDF version of Forum Rules
Your donations help keep this valuable resource free and growing. Thank you.

Brake failureight on. 72 javelin
 Post Reply Post Reply Page  <12
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
Perrybones View Drop Down
AMC Nut
AMC Nut
Avatar

Joined: Oct/05/2008
Location: Freehold NJ
Status: Offline
Points: 274 		Post Options Post Options   Thanks (1) Thanks(1)   Quote Perrybones Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 4:08pm
PHAT is always spot on with the tech. Good job
Perry 70 Javelin SST 390, 69 AMX 343, 73 AMX 360, 67 Rebel SST Conv and 92 Corvette Conv. (modern muscle to keep wife happy).
Back to Top
billd View Drop Down
Moderator Group
Moderator Group

Forum Administrator

Joined: Jun/27/2007
Location: Iowa
Status: Offline
Points: 30894 		Post Options Post Options   Thanks (1) Thanks(1)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Sep/10/2019 at 5:55pm
Originally posted by target target wrote:

Can you do that without losing brake fluid?


Oh, yeah. There should NEVER be fluid there - if there was it would blow out past the switch as that's not really sealed against pressure.

With the Ford type you pull the switch, screw in the tool and it holds the shuttles centered. 

Here's a pic of the AMC type with the o-rings shown in black. You replace those if there's fluid coming out the center.


This is the Ford version - you remove the switch, put the tool in and it has a pin that holds the shuttle from moving - Ford is the opposite of what AMC uses. AMC drops the switch to trigger it, Ford raises the switch pin up to trigger it. 



I have rebuilt these, the combo valves and others as well. 


http://theamcpages.com

http://antique-engines.com
Back to Top
CHAR View Drop Down
AMC Nut
AMC Nut
Avatar

Joined: Feb/22/2019
Location: NW Florida
Status: Offline
Points: 354 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CHAR Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2019 at 3:07pm
This may be far fetched, but the parking brake light is the same circuit.  Fault at the switch at the E brake pedal? Or it that plug loose? 

 I am only hoping because I cant for the life of me figure out where the E brake warning light connection is made on the pedal assemb.  Either Im an idiot and Im looking right at it or its gone.  Anyone got a pic?
72 Javelin SST P code 360/auto/AC/rear defrost /Go Pack/Polar White w blue cord interior.
Back to Top
PHAT69AMX View Drop Down
AMC Addicted
AMC Addicted
Avatar

Joined: Jul/07/2007
Location: West Virginia
Status: Offline
Points: 5926 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PHAT69AMX Quote  Post ReplyReply Direct Link To This Post Posted: Sep/13/2019 at 11:36pm
If it is the Differential Switch being tripped, on the passenger side firewall,
you need to remove the nylon nut, tiny Nylon Pin, Brass Spring, and Brass Ring...
and it may be stuck in there if it is tripped and the brake were bled with it in place,
it may take a pair of tiny pliers to get ahold of the tiny nylon pin and pull it out.
Then maybe mash the brake pedal good and hard a couple few times
to try and see if it will re-center the switch plunger with the pin removed.

This is a less than clear picture of the E-Brake Warning Light Switch on the E-Brake Assy on a '69,
it is a very simple single wire switch that connects to ground when the E-Brake is on.
On the 1969, the E-Brake Warning Light is it's own stand alone 2 wire little harness and Bulb Holder.
It was part of the Light Group or Visibility Group Option iirc.
It is not part of or the same as the Hydraulic Brake Pressure loss switch under the hood.




Edited by PHAT69AMX - Sep/13/2019 at 11:39pm


Link to a Short YouTube Burnout Video
Back to Top
billd View Drop Down
Moderator Group
Moderator Group

Forum Administrator

Joined: Jun/27/2007
Location: Iowa
Status: Offline
Points: 30894 		Post Options Post Options   Thanks (0) Thanks(0)   Quote billd Quote  Post ReplyReply Direct Link To This Post Posted: Sep/14/2019 at 7:26am
That's normally what was done to recenter the pressure differential switch - remove the center switch section and stop the brake pedal to try to recenter the shuttle in the block.

And yea, some cars the light was the same for parking brake or pressure differential - Eagle it was the same light.
So - speaking generally of any question posted here, Fakebook, anywhere - this is why folks REALLY REALLY need to specific the model and year of their car when asking any question. Things can vary. 


http://theamcpages.com

http://antique-engines.com
Back to Top
Dustintf522 View Drop Down
AMC Apprentice
AMC Apprentice
Avatar

Joined: Mar/08/2019
Location: Ohio
Status: Offline
Points: 61 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dustintf522 Quote  Post ReplyReply Direct Link To This Post Posted: Mar/01/2020 at 5:35pm
My nylon cap twisted off! Does anyone have any idea what I can use or find a replacement nylon cap? Thanks in advanced!
Back to Top
 Post Reply Post Reply Page  <12
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.03
Copyright ©2001-2019 Web Wiz Ltd.

This page was generated in 3.016 seconds.
All content of this site Copyright © 2018 TheAMCForum unless otherwise noted, all rights reserved.
PROBLEMS LOGGING IN or REGISTERING:
If you have problems logging in or registering, then please contact a Moderator or